Tool to load in test fixtures

[jvilk]

I'm already working on writing this.

Add a tool that emits a JavaScript script that loads a directory of test files into the current file system.

This will allow us to use Node's fixtures.

Note that this will need to be synchronous for now due to how our tests are run, so I'll likely hack it in specifically for the localStorage test. Later on, if we can make the tests asynchronous, we can alter the tool to emit asynchronous loading code that triggers the test start when it completes.

[jvilk]

Actually, maybe #20 should be made priority. I'll table this until #20 is completed, then I can do this 'properly'.

[jvilk]

Already done.